If you hear a dial tone at the network box, then signal is getting to your home, and you need to check inside. You could be having a problem with your jacks or wiring, which can impact one or multiple phones.
To isolate the problem:
- Hang up all your phones. Be sure they're all hung up completely. If any were off the hook, wait a moment, and see if this corrects the problem.
- Unplug equipment and test jack.
- Unplug all your equipment. First, unplug your phones from both their jacks and electrical outlets. Next, if you have any other equipment that uses a jack, unplug that equipment as well. (For instance, satellite receivers, computer modems, caller ID boxes, fax machines, answering machines and alarm/security systems typically use phone jacks and can cause interference on the line.)
- Test your jacks. After you've unplugged all your equipment, wait one minute and then plug a corded phone into each outlet. Testing one jack at a time, you should hear a clear, strong dial tone when you test each outlet. If you don't, make a note of which outlets don't seem to be working and what you heard when you tested them with your corded phone.
If all your jacks have a clear, strong dial tone, the problem is probably with your phone. You might try replacing it.
If the dial tone on one or more of your jacks is faint, unclear or intermittent, you probably have an inside wiring problem. In this case, you can find an experienced professional to make repairs or you can have a CenturyLink technician do the repair. Read more about your repair options.